[4] It is arranged like a symphony or suite, divided into movements with different moods.

The 4th movement features complex percussion, with reminiscence to West African tribal drumming.

The choir, as in Vangelis' other choral work, sings seemingly random syllables chosen for their timbre.

Similarly, the male tenor vocal of track 4 sings lyrics in a made-up language that resembles Latin.

Timpani and snare drums are the main percussion instruments; both appear to be samples (Emulator I/Emulator II).